Quarkus multi-module example with JPA and REST Client

[faermanj]

Hello,

We're trying to set a very simple example of how to get a quarkus multi-module application working, including REST api and client, with a single entity (Greeting).

We have tried several different configuration alternatives and workarounds, but still not able to get a simple rest API/JPA call across to the http client module.

Here is the repo:
https://github.com/CaravanaCloud/quarkus-multimodule-example

At the time of this writing, CDI is erroring because the EM is not found, because the data module only contains JPA annotations:

[ERROR]         [error]: Build step io.quarkus.arc.deployment.ArcProcessor#validate threw an exception: javax.enterprise.inject.spi.DeploymentException: javax.enterprise.inject.UnsatisfiedResolutionException: Unsatisfied dependency for type javax.persistence.EntityManager and qualifiers [@Default]
[ERROR]         - java member: org.acme.GreetingResource#em

We would appreciate any input towards making this example correct.

Thanks @gsmet and everyone in advance for helping out <3

[quarkus-bot[bot]]

/cc @Sgitario (rest-client), @cescoffier (rest-client), @geoand (rest-client)

[Sgitario]

The problem is that Quarkus does not detect any entities and hence it's disabling the quarkus-hibernate-orm dependency (that's why the EntityManager bean is not resolved). This is because Quarkus does not automatically inspect all the dependencies from your classpath.
So, if you want your data module (the modules containing your entities) to be "seen" by your api module, you need to add the following plugin in the data module:

<build>
        <plugins>
            <!-- The entity classes need to be indexed -->
            <plugin>
                <groupId>io.smallrye</groupId>
                <artifactId>jandex-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <id>make-index</id>
                        <goals>
                            <goal>jandex</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

And now, when building your api module, the entities will be discovered and you can inject the EntityManager bean.

[gsmet]

Yes, that's why I try to tell @faermanj here: https://twitter.com/gsmet_/status/1630630472781840393 but Twitter is kinda limited for that :).

I created a PR here that should make things work: CaravanaCloud/quarkus-multimodule-example#1

[faermanj]

Thank you, i will try that out right away.

[faermanj]

That worked, thanks a lot <3
Not sure where i missed that, perhaps here?
https://quarkus.io/guides/hibernate-orm#defining-entities-in-external-projects-or-jars
I'd be glad to update that if desirable...

[faermanj]

Is there any practical difference between adding beans.xml or the maven plugin?